EP0028296A2 - Arrangement for power-supply and measurement-data transmission from a central station to several measurement posts - Google Patents

Arrangement for power-supply and measurement-data transmission from a central station to several measurement posts Download PDF

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Publication number
EP0028296A2
EP0028296A2 EP80104931A EP80104931A EP0028296A2 EP 0028296 A2 EP0028296 A2 EP 0028296A2 EP 80104931 A EP80104931 A EP 80104931A EP 80104931 A EP80104931 A EP 80104931A EP 0028296 A2 EP0028296 A2 EP 0028296A2
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EP
European Patent Office
Prior art keywords
central station
arrangement according
cable
measurement
transmission
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP80104931A
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German (de)
French (fr)
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EP0028296A3 (en
EP0028296B1 (en
Inventor
Klaus Dr.-Ing. Kranert
Michael Ing.grad. Schröder
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Licentia Patent Verwaltungs GmbH
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Licentia Patent Verwaltungs GmbH
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    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B47/00—Survey of boreholes or wells
    • E21B47/12—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling
    • E21B47/14—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling using acoustic waves
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B47/00—Survey of boreholes or wells
    • E21B47/001—Survey of boreholes or wells for underwater installation
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B47/00—Survey of boreholes or wells
    • E21B47/12—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling
    • E21B47/13—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling by electromagnetic energy, e.g. radio frequency
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V11/00—Prospecting or detecting by methods combining techniques covered by two or more of main groups G01V1/00 - G01V9/00
    • G01V11/002—Details, e.g. power supply systems for logging instruments, transmitting or recording data, specially adapted for well logging, also if the prospecting method is irrelevant

Definitions

  • the invention relates to an arrangement according to the features of the preamble of claim 1.
  • inclination angle measuring devices are arranged distributed over the length of the standpipe.
  • Such systems are usually designed so that cables lead from the individual measuring points to a central station in which the common energy supply for all measuring points is housed and in which the signals of all measuring points are evaluated. Arrangements are also known in which, in order to save on the wiring costs, the energy is supplied via a single cable to which the measuring points are connected individually.
  • FIG. 1 an embodiment of the invention is shown schematically.
  • Figure 1 are connected to a cable loop 1, which runs parallel to a standpipe, not shown, via push-through converters 2, 3 ... n measuring points 4.
  • the cable is longitudinally and transversally watertight and has such a small ohmic resistance that it is practically lossless for the frequencies used.
  • These measuring points are distributed over the length of the cable loop. It may be expedient to provide measuring points in certain areas of the standpipe with smaller mutual distances in order to detect deviations of the standpipe from its desired position more precisely.
  • a generator 5 supplies a constant current with a fixed mains frequency and supplies the cable loop 1 and thus the measuring points 4 with the required energy via an AC switch 6 with thyristors.
  • the AC switch which is used to generate the pulse telegrams via which the measuring points are switched on and off, is followed by two blocking circuits 6a in series. These prevent disturbing harmonics, which are caused by the generator and AC switch, from entering the cable loop.
  • the measuring points 4 can be switched on and off from the central station above the dash-dotted line.
  • the switching commands are sent to the measuring points via serial telegrams. Serves as a data carrier the supply voltage.
  • a frequency generator 7 and a modulator 8 are provided for delivering pulse-coded signals at a carrier frequency f 1 in order to call up the individual measuring points 4 for delivering the measured values.
  • This message from the measuring points 4 to the central station is sent by pulse telegrams with a carrier frequency f 2 .
  • the pulse telegrams with the frequency f 1 are coupled into the cable loop via a transformer.
  • a capacitor is connected to the high-voltage side (cable side) of the transformer and to decouple the mains frequency. It is dimensioned so that the carrier frequency f 2 is not affected.
  • the pulse telegrams f 2 are converted into binary signals in a filter stage 9 and sent to a computer 11 via an amplifier 10.
  • the computer 11 outputs the measured values which are required for correcting the actual position of the vehicle via the drives.
  • the f 2 signals amplified in the filter stage 9 are rectified and smoothed. Binary signals are thus obtained from the pulse telegrams. Since the binary signals can be severely distorted by the filter stage 9, they are sent to a trigger stage, the reference voltage of which is determined in a test run of the measuring arrangement for each measuring point.
  • the push-through converter 2 is dimensioned such that its operating permeability is above the optimal permeability. The saturation induction is not achieved. As the load resistance decreases in transmit mode, the current and the field strength will increase. The permeability that then arises is somewhat below the optimal permeability. Under these A prerequisite can be achieved for the mains voltage that is not disturbed during transmission.
  • a low-pass filter 12, a power supply unit 13 and an accumulator 14 are provided on the winding of the push-through converter 2 to supply power to the measuring point 4.
  • a voltage converter 15 supplies a frequency generator 16 (f 2 ), a modulator 17, a measured value detection element 18 and a receiver 20 with the necessary voltages.
  • the low-pass filter 12 prevents the carrier frequencies f 1 and f 2 from short-circuiting over the power supply 13. At the same time, it contains a blocking circuit for the switching frequencies of the voltage converter 15.
  • the power supply unit 13 contains a rectifier and a parallel regulator at the voltage output, which prevents the battery from being overcharged.
  • the device 18 contains devices for decrypting the address signals, a multiplexer for reading out measuring value transmitters and a converter which converts the measured value information into a serial telegram. This series telegram acts on a modulator 17, which couples its output voltage into the through-type converter 2.
  • the address signals sent by the central station are passed through the converter 2 to the filter 19 and the receiver 20.
  • a filter stage 21 for the mains frequency, a receiver 22 and a block 23, in which a series / parallel conversion UART and a PROM are contained, are also connected to the power supply unit 13 in the measuring point.
  • the output signals d 1 , d 2 and d 3 cause switching inputs as determined by the Switching points d 1 - d 3 are indicated.
  • Each individual measuring point has its own PROM.
  • this disturbance can be identified by switching it on and off and the disturbed measuring point can be separated from the data channel.
  • This switching on and off takes place via the information of a serial telegram, the data carrier being the supply voltage.
  • This telegram contains the address of the measuring point and the instruction as to whether the transmitter is switched off, the measured value acquisition is standardized or the Accumulator to be switched off by the electronics below.
  • the transmission cable is expediently bifilarly wound on a cable drum in the central station, which is additionally given a short-circuit winding to switch off the self-inductance.
  • the measuring section can be set up relatively quickly and measurements can be carried out in water of any depth.
  • the construction of the measuring section can be facilitated according to FIG. 2 in that the core of the push-through converter 2, 3... N is provided with a gap which is closed again with a fitting piece 24 after the cable has been inserted. Since the adapter is not subjected to force even in great water depths, it is sufficient to secure the adapter 24 in its position by means of a spring clip 25.
  • the invention is not limited to use in drilling rigs in which drilling is carried out in deep water by a dynamically positioned drilling platform. It can also be used to advantage when monitoring conveyor pipes for marine mining. In general, elongated structures between a vehicle located on the water surface and the sea floor can be monitored for compliance with permissible loads with the aid of the subject of the application.

Abstract

1. Arrangement for the transmission of measurement values from several measurement locations (4), which are connected one behind the other along an elongate submarine structure, to a central station, wherein a single-core cable (1) runs from the central station to the measurement locations (4), to which cable the measurement locations (4) are connected and which serves for the energy supply of the measurement locations (4) as well as also for the measurement value transmission, and the mass of the structure or the seawater is drawn upon for the return of the current after the last bushing transformer (h), characterised thereby, that a low-frequency generator (5) in the central station supplies the measurement locations (4) with electrical energy in their transmission pauses by way of the cable (1) and by way of bushing transformers (2 ... n), which energy is stored in equipments (14) in the measurement locations (4), and that a frequency generator (7) in the central station by way of a modulator (8) interrogates the individual measurement locations (4) by pulse-coded centre-frequency signals of the frequency (f1 ), recognises, activates or switches off a disturbed measurement location, whilst the measurement value transmission to the central station takes place by means of pulse-coded centre-frequency signals of the frequency (f2 ) over the same bushing transformers (2 ... n).

Description

Die Erfindung befasst sich mit einer Anordnung gemäß den Merkmalen des Oberbegriffs des Anspruches 1.The invention relates to an arrangement according to the features of the preamble of claim 1.

Bei Wasserfahrzeugen, z. B. Bohrplattformen, insbesondere solchen, die für Tiefbohrungen verwendet werden und mittels Ankerseilen und Ankerwinden über der Bohrposition gehalten werden, ist es bekannt, daß die Position des Wasserfahrzeuges von dem Bohrloch nur in bestimmten engen Grenzen abweichen darf. Werden diese Grenzen überschritten, wird das Standrohr (Riser), in dem das Bohrgestänge geführt ist, unzulässig hoch beansprucht. Bei Beschädigung der Bohreinrichtung sind umfangreiche Austauscharbeiten auszuführen, abgesehen von den wirtschaftlichen Verlusten.For watercraft, e.g. B. drilling platforms, especially those that are used for deep drilling and are held by means of anchor ropes and windlasses above the drilling position, it is known that the position of the watercraft from the borehole may only vary within certain narrow limits. If these limits are exceeded, the riser in which the drill pipe is guided is subjected to impermissibly high loads. If the drilling equipment is damaged, extensive exchange work must be carried out, apart from the economic losses.

Um die Lage des Standrohres jederzeit kontrollieren und entsprechende Befehle an Antriebseinrichtungen und Winden geben zu können, um Abweichungen des Fahrzeuges aus einer Sollage auszuregeln, sind über die Länge des Standrohres verteilt Neigungswinkelmeßeinrichtungen angeordnet. Diese von einer Zentralstation auf dem Wasserfahrzeug ständig nacheinander abgefragten Einrichtungen geben in ihrer Gesamtheit jederzeit ein genaues Bild über die Lage des Standrohres (DE-AS 25 02 020).In order to be able to check the position of the standpipe at any time and to give appropriate commands to drive devices and winches in order to correct deviations of the vehicle from a target position, inclination angle measuring devices are arranged distributed over the length of the standpipe. These The facilities that are continuously queried one after the other by a central station on the watercraft in their entirety provide an accurate picture of the position of the standpipe at all times (DE-AS 25 02 020).

Derartige Anlagen sind üblicherweise so ausgelegt, daß Kabel von den einzelnen Meßstellen zu einer Zentralstation führen, in der die gemeinsame Energieversorgung für alle Meßstellen untergebracht ist und in der die Signale aller Meßstellen ausgewertet werden. Es sind auch Anordnungen bekannt, bei denen zur Ersparnis der Verkabelungskosten die Energieversorgung über ein einziges Kabel erfolgt, an welches die Meßstellen einzeln angeschlossen sind.Such systems are usually designed so that cables lead from the individual measuring points to a central station in which the common energy supply for all measuring points is housed and in which the signals of all measuring points are evaluated. Arrangements are also known in which, in order to save on the wiring costs, the energy is supplied via a single cable to which the measuring points are connected individually.

Für Anlagen, die in einer sehr ungünstigen Umgebung, z.B. unter Wasser, eingesetzt werden, bringen die elektrischen Verbindungen, die an jeder einzelnen Meßstelle erforderlich sind, eine erhebliche Verringerung der Betriebssicherheit mit sich.For systems operating in a very unfavorable environment, e.g. used under water, the electrical connections that are required at each individual measuring point bring with it a considerable reduction in operational safety.

Die der Erfindung zugrundeliegende Aufgabe für eine Anordnung gemäß dem Oberbegriff des Hauptanspruches ist darin zu sehen, daß eine Anordnung verwendet wird, die für eine Vielzahl von Meßstellen unter erschwerten Umweltbedingungen eine kontaktlose Energie- und Meßwertübertragung auf eine Zentralstation gestattet, dabei einfach zu handhaben ist und eine große Informationsmenge verarbeiten kann.The object on which the invention is based for an arrangement according to the preamble of the main claim is to be seen in the fact that an arrangement is used which permits contactless energy and measured value transmission to a central station for a large number of measuring points under difficult environmental conditions, and is easy to handle and can process a large amount of information.

Diese Aufgabe wird erfindungsgemäß durch die im Kennzeichen des Hauptanspruches angegebenen Merkmale gelöst. Weiterbildungen der Erfindung sind in den Unteransprüchen gekennzeichnet. Der wesentliche Vorteil einer Anordnung nach der Erfindung besteht darin, daß ein einfacher Aufbau der Meßstellen über die Durchsteckwandler möglich und die Anordnung bis zu größten Wassertiefen verwendbar ist.This object is achieved by the features specified in the characterizing part of the main claim. Developments of the invention are characterized in the subclaims. The main advantage of an arrangement according to the invention is that a simple construction of the measuring points is possible via the push-through transducers and the arrangement can be used up to the greatest water depths.

In der Zeichnung ist ein Ausführungsbeispiel nach der Erfindung schematisch dargestellt. Gemäß Figur 1 sind an eine Kabelschleife 1, die parallel zu einem nicht dargestellten Standrohr verläuft, über Durchsteckwandler 2, 3 ... n Meßstellen 4 angeschlossen. Das Kabel ist längs- und querwasserdicht und hat einen so kleinen ohmschen Widerstand, daß es für die verwendeten Frequenzen praktisch verlustlos ist. Diese Meßstellen sind über die Länge der Kabelschleife verteilt angeordnet. Es kann zweckmässig sein, Meßstellen in bestimmten Bereichen des Standrohres mit kleineren gegenseitigen Abständen vorzusehen, um Abweichungen des Standrohres aus seiner Solllage genauer zu erfassen.In the drawing, an embodiment of the invention is shown schematically. According to Figure 1 are connected to a cable loop 1, which runs parallel to a standpipe, not shown, via push-through converters 2, 3 ... n measuring points 4. The cable is longitudinally and transversally watertight and has such a small ohmic resistance that it is practically lossless for the frequencies used. These measuring points are distributed over the length of the cable loop. It may be expedient to provide measuring points in certain areas of the standpipe with smaller mutual distances in order to detect deviations of the standpipe from its desired position more precisely.

Ein Generator 5 liefert einen konstanten Strom mit fester Netzfrequenz und versorgt über einen Wechselstromschalter 6 mit Thyristoren die Kabelschleife 1 und damit die Meßstellen 4 mit der erforderlichen Energie. Dem Wechselstromschalter, der zur Erzeugung der Impulstelegramme dient, über die die Meßstellen ein- und ausgeschaltet werden, sind zwei Sperrkreise 6a in Reihe nachgeschaltet. Diese verhindern, daß störende Oberwellen, die durch Generator und Wechselstromschalter hervorgerufen werden, in die Kabelschleife gelangen. Von der Zentralstation oberhalb der strichpunktierten Linie können die Meßstellen 4 ein- und ausgeschaltet werden. Die Schaltbefehle werden über Serientelegramme an die Meßstellen gegeben. Als Datenträger dient die Versorgungsspannung. Ein Frequenzgenerator 7 und ein Modulator 8 sind vorgesehen zur Abgabe impulscodierter Signale bei einer Trägerfrequenz f1, um die einzelnen Meßstellen 4 zur Abgabe der Meßwerte aufzurufen. Diese Meldung von den Meßstellen 4 zur Zentralstation wird durch Impulstelegramme mit einer Trägerfrequenz f2 gesendet. Die Impulstelegramme mit der Frequenz f1 werden über einen Übertrager in die Kabelschleife eingekoppelt. In die Hochspannungsseite (Kabelseite) des Übertragers und zur Auskopplung der Netzfrequenz ist ein Kondensator geschaltet. Er wird so dimensioniert, daß die Trägerfrequenz f2 nicht beeinträchtigt wird. Die Impulstelegramme f2 werden in einer Filterstufe 9 in Binärsignale umgewandelt und über einen Verstärker 10 an einen Rechner 11 gegeben. Der Rechner 11 gibt die Meßwerte aus, die zur Korrektur der Istposition des Fahrzeuges über die Antriebe erforderlich sind. Die in der Filterstufe 9 verstärkten f2-Signale werden gleichgerichtet und geglättet. Damit werden Binärsignale aus den Impulstelegrammen gewonnen. Da die Binärsignale durch die Filterstufe 9 stark verzerrt sein können, werden sie auf eine Triggerstufe gegeben, deren Referenzspannung in einem Probelauf der Meßanordnung für jede Meßstelle ermittelt wird.A generator 5 supplies a constant current with a fixed mains frequency and supplies the cable loop 1 and thus the measuring points 4 with the required energy via an AC switch 6 with thyristors. The AC switch, which is used to generate the pulse telegrams via which the measuring points are switched on and off, is followed by two blocking circuits 6a in series. These prevent disturbing harmonics, which are caused by the generator and AC switch, from entering the cable loop. The measuring points 4 can be switched on and off from the central station above the dash-dotted line. The switching commands are sent to the measuring points via serial telegrams. Serves as a data carrier the supply voltage. A frequency generator 7 and a modulator 8 are provided for delivering pulse-coded signals at a carrier frequency f 1 in order to call up the individual measuring points 4 for delivering the measured values. This message from the measuring points 4 to the central station is sent by pulse telegrams with a carrier frequency f 2 . The pulse telegrams with the frequency f 1 are coupled into the cable loop via a transformer. A capacitor is connected to the high-voltage side (cable side) of the transformer and to decouple the mains frequency. It is dimensioned so that the carrier frequency f 2 is not affected. The pulse telegrams f 2 are converted into binary signals in a filter stage 9 and sent to a computer 11 via an amplifier 10. The computer 11 outputs the measured values which are required for correcting the actual position of the vehicle via the drives. The f 2 signals amplified in the filter stage 9 are rectified and smoothed. Binary signals are thus obtained from the pulse telegrams. Since the binary signals can be severely distorted by the filter stage 9, they are sent to a trigger stage, the reference voltage of which is determined in a test run of the measuring arrangement for each measuring point.

Der Durchsteckwandler 2 ist so dimensioniert, daß seine Betriebspermeabilität oberhalb der optimalen Permeabilität liegt. Die Sättigungsinduktion wird dabei nicht erreicht. Da sich im Sendebetrieb der Lastwiderstand verkleinert, werden sich der Strom und die Feldstärke vergrößern. Die sich dann einstellende Permeabilität liegt etwas unterhalb der optimalen Permeabilität. Unter diesen Voraussetzungen kann für die Netzspannung eine Leistungsanpassung erreicht werden, die im Sendebetrieb nicht gestört wird. An die Wicklung des Durchsteckwandlers 2 ist zur Stromversorgung der Meßstelle 4 ein Tiefpass 12, ein Netzgerät 13 sowie ein Akkumulator 14 vorgesehen. Ein Spannungswandler 15 versorgt einen Frequenzgenerator 16 (f2), einen Modulator 17, ein Meßwerterfassungsglied 18 und einen Empfänger 20 mit den notwendigen Spannungen. Der Tiefpaß 12 verhindert, daß die Trägerfrequenzen f1 und f2 sich über dem Netzgerät 13 kurzschließen. Zugleich enthält er einen Sperrkreis für die Schaltfrequenzen des Spannungswandlers 15. Das Netzgerät 13 enthält einen Gleichrichter und einen Parallelregler am Spannungsausgang, der ein Überladen des Akkumulators verhindert.The push-through converter 2 is dimensioned such that its operating permeability is above the optimal permeability. The saturation induction is not achieved. As the load resistance decreases in transmit mode, the current and the field strength will increase. The permeability that then arises is somewhat below the optimal permeability. Under these A prerequisite can be achieved for the mains voltage that is not disturbed during transmission. A low-pass filter 12, a power supply unit 13 and an accumulator 14 are provided on the winding of the push-through converter 2 to supply power to the measuring point 4. A voltage converter 15 supplies a frequency generator 16 (f 2 ), a modulator 17, a measured value detection element 18 and a receiver 20 with the necessary voltages. The low-pass filter 12 prevents the carrier frequencies f 1 and f 2 from short-circuiting over the power supply 13. At the same time, it contains a blocking circuit for the switching frequencies of the voltage converter 15. The power supply unit 13 contains a rectifier and a parallel regulator at the voltage output, which prevents the battery from being overcharged.

Im Glied 18 sind Einrichtungen zum Entschlüsseln der Adreßsignale, ein Multiplexer zum Auslesen von Meßwertgebern und ein Wandler enthalten, der die Meßwertinformationen in ein Serientelegramm umsetzt. Dieses Serientelegramm wirkt auf einen Modulator 17, der seine Ausgangsspannung in den Durchsteckwandler 2 einkoppelt.The device 18 contains devices for decrypting the address signals, a multiplexer for reading out measuring value transmitters and a converter which converts the measured value information into a serial telegram. This series telegram acts on a modulator 17, which couples its output voltage into the through-type converter 2.

Die von der Zentralstation gesendeten Adreßsignale werden über den Wandler 2 auf das Filter 19 und den Empfänger 20 gegeben.The address signals sent by the central station are passed through the converter 2 to the filter 19 and the receiver 20.

An das Netzgerät 13 in der Meßstelle sind ferner eine Filterstufe 21 für die Netzfrequenz, ein Empfänger 22 sowie ein Block 23 angeschlossen, in dem eine Serien-/ Parallelwandlung UART und ein PROM enthalten sind. Die Ausgangssignale d1, d2 und d3 veranlassen bei bestimmten Eingangssignalen Schalthanälungen, wie sie durch die Schaltstellen d1 - d3 angedeutet sind. Jede einzelne Meßstelle weist ein eigenes PROM auf.A filter stage 21 for the mains frequency, a receiver 22 and a block 23, in which a series / parallel conversion UART and a PROM are contained, are also connected to the power supply unit 13 in the measuring point. The output signals d 1 , d 2 and d 3 cause switching inputs as determined by the Switching points d 1 - d 3 are indicated. Each individual measuring point has its own PROM.

Die Wirkungsweise der Anordnung ist folgende:

  • Die aus dem Generator 5 mit Energie versorgte Kabelleitung 1 ist hinter dem letzten Durchsteckwandler n über das Seewasser und die Metallstruktur wieder mit dem Generator verbungen. Die Rückleitung kann aber auch die Kabelleitung 1 sein, die dann außen an den Durchsteckwandlern entlang zum Generator zurückführt. Die einzelnen Meßstellen 4 werden mit Hilfe von Mittelfrequenz-Impulstelegrammen f1 zur Abgabe ihrer Meßwerte aufgerufen. Die Adreßsignale werden in der Zentralstation erzeugt und mit Hilfe des Generators 7 und des Modulators 8 auf die Kabelleitung 1 gegeben. Dort wird mit der gesendeten Adresse eine der Meßstellen 4 über den jeweiligen Durchsteckwandler angesprochen. Alle anderen Meßstellen bleiben passiv. Die aufgerufene Meßstelle antwortet mit einem Serientelegramm, das die Meßwerte enthält. Die für das Antworttelegramm notwendige Energie wird aus dem Akkumulator 14 bezogen. Dieser wird in den Sendepausen wieder aufgeladen und hat nur die zum Senden erforderliche Energie bereitzustellen.
The arrangement works as follows:
  • The cable line 1 supplied with energy from the generator 5 is connected to the generator behind the last push-through converter n via the seawater and the metal structure. The return line can also be the cable line 1, which then leads back to the generator along the push-through converters. The individual measuring points 4 are called up with the aid of medium-frequency pulse telegrams f 1 to deliver their measured values. The address signals are generated in the central station and given to the cable line 1 with the help of the generator 7 and the modulator 8. There, one of the measuring points 4 is addressed with the address sent via the respective push-through converter. All other measuring points remain passive. The called measuring point answers with a serial telegram that contains the measured values. The energy required for the response telegram is obtained from the accumulator 14. This is recharged in the transmission breaks and only has to provide the energy required for transmission.

Wenn eine der Meßstellen gestört sein sollte, kann diese Störung durch das gezielte Ein- und Ausschalten erkannt und die gestörte Meßstelle von dem Datenkanal getrennt werden. Diese Ein- und Ausschaltung erfolgt über die Information eines Serientelegramms, wobei der Datenträger die Versorgungsspannung ist. Dieses Telegramm enthält die Adresse der Meßstelle und die Anweisung, ob der Sender ausgeschaltet, die Meßwerterfassung normiert oder der Akkumulator von der nachfolgenden Elektronik abgeschaltet werden soll.If one of the measuring points should be disturbed, this disturbance can be identified by switching it on and off and the disturbed measuring point can be separated from the data channel. This switching on and off takes place via the information of a serial telegram, the data carrier being the supply voltage. This telegram contains the address of the measuring point and the instruction as to whether the transmitter is switched off, the measured value acquisition is standardized or the Accumulator to be switched off by the electronics below.

Das Übertragungskabel ist zweckmässig bifilar auf einer Kabeltrommel in der Zentralstation aufgewickelt, die zur Ausschaltung der Eigeninduktivität zusätzlich eine Kurzschlußwicklung erhält.The transmission cable is expediently bifilarly wound on a cable drum in the central station, which is additionally given a short-circuit winding to switch off the self-inductance.

Mit Hilfe der Durchsteckwandler kann die Meßstrecke verhältnismässig rasch aufgebaut und Messungen in beliebig tiefem Wasser durchgeführt werden.With the aid of the push-through converter, the measuring section can be set up relatively quickly and measurements can be carried out in water of any depth.

Der Aufbau der Meßstrecke kann gemäß Figur 2 dadurch erleichtert werden, daß der Kern des Durchsteckwandlers 2, 3 ... n mit einem Spalt versehen wird, der nach Einführung des Kabels mit einem Paßstück 24 wieder geschlossen wird. Da das Paßstück selbst in großen Wassertiefen kräftenässig nicht beansprucht wird, reicht es aus, das Paßstück 24 durch eine federnde Klammer 25 in seiner Lage zu sichern.The construction of the measuring section can be facilitated according to FIG. 2 in that the core of the push-through converter 2, 3... N is provided with a gap which is closed again with a fitting piece 24 after the cable has been inserted. Since the adapter is not subjected to force even in great water depths, it is sufficient to secure the adapter 24 in its position by means of a spring clip 25.

Die Erfindung ist nicht auf die Anwendung in Bohranlagen beschränkt, bei denen von einer dynamisch positionierten Bohrplattform Bohrung in tiefem Wasser niedergebracht werden. Ebenso ist sie mit Vorteil einsetzbar bei der Überwachung von Förderrohren für den Meeresbergbau. Ganz allgemein können langgestreckte Strukturen zwischen einem an der Wasseroberfläche befindlichen Fahrzeug und dem Meeresboden mit Hilfe des Anmeldungsgegenstandes auf die Einhaltung zulässiger Beanspruchungen überwacht werden.The invention is not limited to use in drilling rigs in which drilling is carried out in deep water by a dynamically positioned drilling platform. It can also be used to advantage when monitoring conveyor pipes for marine mining. In general, elongated structures between a vehicle located on the water surface and the sea floor can be monitored for compliance with permissible loads with the aid of the subject of the application.

Claims (13)

1. Anordnung zur Übertragung von Meßwerten von mehreren Meßstellen auf eine Zentralstation, insbesondere zur Meßwertübertragung entlang eines Risers für Bohrstellen in tiefem Wasser, eines Förderrohres für Meeresbergbau o. ä., wobei ein Einaderkabel mit von der Zentralstation zum Bohrloch geführt ist, dadurch gekennzeichnet, daß die einzelnen Meßstellen über Durchsteckwandler ihre Energie von einem an das Kabel in der Zentralstation angeschlossenen Niederfrequenzgenerator erhalten, daß die Abfrage der einzelnen Meßstellen über pulscodierte Mittelfrequenzsignale von der Zentralstation erfolgt, während die Übertragung der Meßwerte zur Zentralstation über dieselben Durchsteckwandler mittels pulscodierter Telegramme in einem anderen Mittelfrequenzbereich erfolgt, und daß Einrichtungen in den Meßstellen die über das Kabel zugeführte Energie speichern.1. Arrangement for the transmission of measured values from a plurality of measuring points to a central station, in particular for the transmission of measured values along a riser for drilling points in deep water, a conveying pipe for marine mining or the like, a single-core cable being led from the central station to the borehole, characterized in that that the individual measuring points receive their energy from a low-frequency generator connected to the cable in the central station, that the individual measuring points are queried via pulse-coded medium frequency signals from the central station, while the transmission of the measured values to the central station via the same push-through converter using pulse-coded telegrams in another Medium frequency range takes place, and that devices in the measuring points store the energy supplied via the cable. 2. Anordnung nach Anspruch 1, dadurch gekennzeichnet, daß die Rückführung des Stromes nach dem letzten Durchsteckwandler über Masse oder durch das Seewasser erfolgt.2. Arrangement according to claim 1, characterized in that the return of the current takes place after the last push-through converter via ground or by the sea water. 3. Anordnung nach den Ansprüchen 1 oder 2, dadurch gekennzeichnet, daß die Zentralstation während der Abfrage eine gestörte Meßstelle erkennt und durch pulscodierte Signale auf der Versorgungsspannung die Meßstelle neu aktiviert oder abschaltet.3. Arrangement according to claims 1 or 2, characterized in that the central station recognizes a disturbed measuring point during the query and the measuring point is reactivated or switched off by pulse-coded signals on the supply voltage. 4. Anordnung nach Anspruch 1, dadurch gekennzeichnet, daß in dem Wechselstromteil des Schalters (6) Sperrkreise (6a) vorgesehen sind für beide Trägerfrequenzen f1 und f2.4. Arrangement according to claim 1, characterized in that in the AC part of the switch (6) blocking circuits (6a) are provided for both carrier frequencies f 1 and f 2 . 5. Anordnung nach Anspruch 1, dadurch gekennzeichnet, daß der Energiespeicher (14) zur Versorgung der Meßstelle in den Sendepausen aus der Versorgungsspannung aufgeladen wird.5. Arrangement according to claim 1, characterized in that the energy store (14) for supplying the measuring point in the transmission breaks is charged from the supply voltage. 6. Anordnung nach Anspruch 1, dadurch gekennzeichnet, daß der Betriebspunkt des Wandlers (17) so gewählt ist, daß bei Einschaltung die Sendeleistung der Meßstelle optimiert ist.6. Arrangement according to claim 1, characterized in that the operating point of the converter (17) is selected so that the transmission power of the measuring point is optimized when switched on. 7. Anordnung nach Anspruch 1, dadurch gekennzeichnet, daß die Versorgungsspannung durch eine Regeleinrichtung so eingestellt ist, daß der Strom im Kabel konstant ist.7. Arrangement according to claim 1, characterized in that the supply voltage is set by a control device so that the current in the cable is constant. 8. Anordnung nach Anspruch 1, dadurch gekennzeichnet, daß die Meßstellen (4) nacheinander von der Zentralstation zur Signalabgabe aufgerufen werden.8. Arrangement according to claim 1, characterized in that the measuring points (4) are called up one after the other by the central station for signaling. 9. Anordnung nach Anspruch 3, dadurch gekennzeichnet, daß in einem Testlauf die Triggerspannung (Offsetspannung) für jede Meßstelle (4) ermittelt wird.9. Arrangement according to claim 3, characterized in that the trigger voltage (offset voltage) for each measuring point (4) is determined in a test run. 10. Anordnung nach Anspruch 1, dadurch gekennzeichnet, daß das Übertragungskabel bifilar auf eine Kabelvorratstrommel aufgewickelt ist. 1 0. Arrangement according to claim 1, characterized in that the transmission cable is wound bifilar on a cable storage drum. 11. Anordnung nach Anspruch 10, dadurch gekennzeichnet, daß zur Ausschaltung der Eigeninduktivität zusätzlich eine Kurzschlußwicklung auf der Kabeltrommel vorgesehen ist.11. The arrangement according to claim 10, characterized in that a short-circuit winding is additionally provided on the cable drum to switch off the self-inductance. 12. Anordnung nach Anspruch 1, dadurch gekennzeichnet, daß der Durchsteckwandler derart modifiziert ist, daß der Wandlerkern einen Spalt aufweist, der durch ein Paßstück (24) wieder verschlossen ist.12. The arrangement according to claim 1, characterized in that the push-through converter is modified such that the converter core has a gap which is closed again by a fitting (24). 13. Anordnung nach Anspruch 12, dadurch gekennzeichnet, daß das Paßstück (24) mittels einer federnden Klammer (25) in seiner Lage gesichert ist. 13 . Arrangement according to claim 12, characterized in that the fitting piece (24) is secured in its position by means of a spring clip (25).
EP80104931A 1979-10-31 1980-08-20 Arrangement for power-supply and measurement-data transmission from a central station to several measurement posts Expired EP0028296B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2943979A DE2943979C2 (en) 1979-10-31 1979-10-31 Arrangement for the transmission of measured values from several measuring points connected in series along an elongated underwater structure to a central station
DE2943979 1979-10-31

Publications (3)

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EP0028296A2 true EP0028296A2 (en) 1981-05-13
EP0028296A3 EP0028296A3 (en) 1984-11-28
EP0028296B1 EP0028296B1 (en) 1986-11-12

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EP (1) EP0028296B1 (en)
DE (1) DE2943979C2 (en)
NO (1) NO803182L (en)

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WO2002037640A1 (en) * 2000-10-30 2002-05-10 Cooper Cameron Corporation Control and supply system
US6633236B2 (en) 2000-01-24 2003-10-14 Shell Oil Company Permanent downhole, wireless, two-way telemetry backbone using redundant repeaters
US6633164B2 (en) 2000-01-24 2003-10-14 Shell Oil Company Measuring focused through-casing resistivity using induction chokes and also using well casing as the formation contact electrodes
US6662875B2 (en) 2000-01-24 2003-12-16 Shell Oil Company Induction choke for power distribution in piping structure
US6679332B2 (en) 2000-01-24 2004-01-20 Shell Oil Company Petroleum well having downhole sensors, communication and power
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US7114561B2 (en) 2000-01-24 2006-10-03 Shell Oil Company Wireless communication using well casing
US7147059B2 (en) 2000-03-02 2006-12-12 Shell Oil Company Use of downhole high pressure gas in a gas-lift well and associated methods
US7170424B2 (en) 2000-03-02 2007-01-30 Shell Oil Company Oil well casting electrical power pick-off points
WO2007071266A1 (en) * 2005-12-19 2007-06-28 Siemens Aktiengesellschaft Electrical power system for a subsea system
US7433214B2 (en) 2001-09-19 2008-10-07 Cameron International Corporation DC converter
US7453170B2 (en) 2001-09-19 2008-11-18 Cameron International Corporation Universal energy supply system
US7759827B2 (en) 2001-09-19 2010-07-20 Cameron International Corporation DC voltage converting device having a plurality of DC voltage converting units connected in series on an input side and in parallel on an output side
CN101201002B (en) * 2006-12-14 2011-06-22 中国石油天然气集团公司 Long-range single-cord well logging bus control system
US8106536B2 (en) 2001-09-19 2012-01-31 Cameron International Corporation Universal power supply system
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WO2000046616A1 (en) * 1999-02-05 2000-08-10 Schlumberger Technology B.V. A method of saving a string of tools installed in an oil well, and a corresponding transmission assembly
GB2363554A (en) * 1999-02-05 2001-12-19 Schlumberger Holdings A method of saving a string of tools installed in an oil well, and a corresponding transmission assembly
US6633164B2 (en) 2000-01-24 2003-10-14 Shell Oil Company Measuring focused through-casing resistivity using induction chokes and also using well casing as the formation contact electrodes
US6633236B2 (en) 2000-01-24 2003-10-14 Shell Oil Company Permanent downhole, wireless, two-way telemetry backbone using redundant repeaters
US6981553B2 (en) 2000-01-24 2006-01-03 Shell Oil Company Controlled downhole chemical injection
US6662875B2 (en) 2000-01-24 2003-12-16 Shell Oil Company Induction choke for power distribution in piping structure
US7114561B2 (en) 2000-01-24 2006-10-03 Shell Oil Company Wireless communication using well casing
US6679332B2 (en) 2000-01-24 2004-01-20 Shell Oil Company Petroleum well having downhole sensors, communication and power
US6715550B2 (en) 2000-01-24 2004-04-06 Shell Oil Company Controllable gas-lift well and valve
US6758277B2 (en) 2000-01-24 2004-07-06 Shell Oil Company System and method for fluid flow optimization
US6817412B2 (en) 2000-01-24 2004-11-16 Shell Oil Company Method and apparatus for the optimal predistortion of an electromagnetic signal in a downhole communication system
WO2001055555A1 (en) * 2000-01-24 2001-08-02 Shell Internationale Research Maatschappij B.V. Choke inductor for wireless communication and control in a well
US6840316B2 (en) 2000-01-24 2005-01-11 Shell Oil Company Tracker injection in a production well
US7073594B2 (en) 2000-03-02 2006-07-11 Shell Oil Company Wireless downhole well interval inflow and injection control
US7170424B2 (en) 2000-03-02 2007-01-30 Shell Oil Company Oil well casting electrical power pick-off points
US6851481B2 (en) 2000-03-02 2005-02-08 Shell Oil Company Electro-hydraulically pressurized downhole valve actuator and method of use
US6840317B2 (en) 2000-03-02 2005-01-11 Shell Oil Company Wireless downwhole measurement and control for optimizing gas lift well and field performance
US7075454B2 (en) 2000-03-02 2006-07-11 Shell Oil Company Power generation using batteries with reconfigurable discharge
US6868040B2 (en) 2000-03-02 2005-03-15 Shell Oil Company Wireless power and communications cross-bar switch
US7147059B2 (en) 2000-03-02 2006-12-12 Shell Oil Company Use of downhole high pressure gas in a gas-lift well and associated methods
US7576447B2 (en) 2000-10-30 2009-08-18 Cameron International Corporation Control and supply system
WO2002037640A1 (en) * 2000-10-30 2002-05-10 Cooper Cameron Corporation Control and supply system
US7851949B2 (en) 2001-09-19 2010-12-14 Cameron International Corporation DC converter
US7453170B2 (en) 2001-09-19 2008-11-18 Cameron International Corporation Universal energy supply system
US7433214B2 (en) 2001-09-19 2008-10-07 Cameron International Corporation DC converter
US7683505B2 (en) 2001-09-19 2010-03-23 Cameron International Corporation Universal energy supply system
US7759827B2 (en) 2001-09-19 2010-07-20 Cameron International Corporation DC voltage converting device having a plurality of DC voltage converting units connected in series on an input side and in parallel on an output side
US8106536B2 (en) 2001-09-19 2012-01-31 Cameron International Corporation Universal power supply system
US8492927B2 (en) 2001-09-19 2013-07-23 Cameron International Corporation Universal power supply system
WO2007071266A1 (en) * 2005-12-19 2007-06-28 Siemens Aktiengesellschaft Electrical power system for a subsea system
US8251614B2 (en) 2005-12-19 2012-08-28 Siemens Aktiengesellschaft Electrical power system for a subsea system
NO343802B1 (en) * 2005-12-19 2019-06-11 Siemens Ag Electrical power system for a subsea system, as well as a method for operating at least one electrical load in a subsea application.
CN101201002B (en) * 2006-12-14 2011-06-22 中国石油天然气集团公司 Long-range single-cord well logging bus control system
US8174403B2 (en) 2007-11-30 2012-05-08 Schlumberger Technology Corporation Methods and apparatus for telemetry and power delivery

Also Published As

Publication number Publication date
DE2943979A1 (en) 1981-05-07
DE2943979C2 (en) 1986-02-27
NO803182L (en) 1981-05-04
EP0028296A3 (en) 1984-11-28
EP0028296B1 (en) 1986-11-12

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